Bass, also known as "Forte" in Japan, is a prominent villain and rival of Mega Man. Created by Dr. Wily, he was originally made from stolen designs on Mega Man, and unleashed to counter and defeat Mega Man with his own weapons and tactics. But as time went on, he escaped Dr. Wily's grasp and went out on his own, even creating a robot companion, Treble (a counterpart to Rush). On occasion, the animosity between Bass and Mega Man would cease and the two would join forces to fight a common enemy, eventually their rivalry diminished and the two become partners of sorts. He is DLC in Nintendo vs. Capcom.

Bass appears as a playable character in FOE and one of the few starter characters in the roster. Bass is assisted with Treble who he can summon to help him in battle. Bass can attack from afar with his Bass Buster, giving him a great spacing game. But it takes a while for players to learn him and his tall figure makes him easy to help.